| With the rapid development of informationization construction in Chinese shipbuilding enterprises, many of them have various CAX systems through their own development or external introduction. Digital shipbuilding in China has been made considerable progress through the usage of the informationization system. However, in the process of ship design and manufacture, shipbuilding enterprises always choose different CAX systems in various production stages according to different requirements.The heterogeneous CAX systems are constructed in different platforms by different manufacturers for different system. Therefore, it is hard to realize information sharing and exchange between each other, which leads to a large amount of information island.Through constructing data platform of digital shipbuilding integration, the research eliminate the information island. The methods realize system integration of heterogeneous CAX systems in digital shipbuilding based on ship data exchange technology of STEP product data exchange standards. In order to fulfill the integration of digital shipbuilding manufacture, management and application, the research will constantly improve the level of our shipbuilding industry design, manufacturing and management, improve shipbuilding quality, shorten the shipbuilding period, and promote competitiveness of enterprise.The main purpose of digital shipbuilding integration data platform is placed on the construction of enterprises informatization system for seamless integration, in which achieving the standardization of ship products data is the key and difficult research aspect.This paper analyses STEP standard of ship and data exchange and sharing of heterogeneous platform, taking STEP standard to describe ship products data. Data exchange and sharing mechanism based on neutral files are also proposed in this paper and converter of neutral files have been developed to solve the key point of technology in data exchange. The main research work includes:1. This paper summarizes the present construction situation of shipbuilding enterprises informatization at home and abroad and the problems of Chinese shipbuilding enterprises in the informatization construction by studying development state in the field concerned. The key technologies which should be solved in the future development are summarized in analysing modern shipbuilding mode and the development of shipbuilding industry. The paper proposes the key problem and main content of data platform of digital shipbuilding integration.2. This paper makes a systematic introduction to basic principle of products data exchange from the problems to be solved in data exchange and sharing. EXPRESS message information modeling language of STEP standard protocol and document structure and the mode of data management for STEP neutral file are thorough verified. Aiming at systems integration of ship product model data, the paper has made the brief introduction on shipbuilding industry standard in STEP protocol, lay a theoretical foundation for key technology data integration platform.3. By choosing smooth molded lines accomplished by the current domestic 3D software TRIBON system that are widely used for data sources, the research, which takes standard export interface IGES documents generated as a research object, completed the development of AP216 application tool. On the basis of this study, STEP neutral files of molded lines, obtained by developed AP216 application tool, are well reconstructed in CATIA and ST-TOOLS. The paper completed the conversion work of molded line data from neutral file to other 3D software. And selecting cabin arrangement as research object, the research develops AP215 processor, generats a neutral files, reconstructs neutral files generated in ST-TOOLS and verifies the feasibility of the conversion system.The paper aims to the problem of file conversion from the cabin research data of a 3D system, relying on AP215 system of STEP application protocols to neutral files.The research selects hull model and outfitting model of TRIBON system as applied objects. According to mapping rules from EXPRESS models to STEP neutral files, the system analysis, which establishes neutral file conversion system, extracts hull data, outfitting data and the transformation problems of Neutral files between AP218 and AP227 in STEP application protocols from TRIBON system. By the development of conversion tool, the paper converts extracted information into STEP neutral file format for data exchange and at last importing generated files into ST-TOOLS to complete data exchange and verify the accuracy of the models.4. Based on the data characteristic of TRIBON system, the database structure of SPAR management system and the research of data integration methods between schedule planning and accounting system, this paper puts forward data transformation method from TRIBON system to SPAR system relying on interim file and writes data conversion tool programs to realize the data transformation between two systems. By using work breakdown structure and the critical path method, the paper proposes the conversion method from production design information to production management information, building integration platform of production, design and management taking SPAR system as the core.
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